<http://schema.org/about>
"More and more research has been coming out recently on how much carbon is stored in different ecosystems. The latest is from an IUCN report (via Mongabay) which shows that coastal habitats store up to 50 times"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/mangroves-coastal-wetlands-store-50-times-more-carbon-than-tropical-forests-by-area.html>